Heart attack? Nope, just a spin class from MSNBC

For anyone who has felt like their heart might explode after a spin class, the truth might not be that far off -- biochemically speaking, that is. New research out of Sweden has shown an hour of spinning triggers the same biochemical reactions as a heart attack.

Research from the University of Gothenburg has shown that spin workouts and other forms of strenuous exercise can secrete the same enzymes into the bloodstream as a heart attack, increasing the possibility of a misdiagnosis. The results will be published in the Scandinavian Cardiovascular Journal.

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